A sample of 12 parts were randomly selected from a production process. The lengt

Question

A sample of 12 parts were randomly selected from a production process. The length was measured on all 12 parts with the mean and variance of 25 mm and 3 mm^2, respectively. What is the standard Error. Give your answer to 3 decimal places. A sample of 12 parts were randomly selected from a production process. The length was measured on all 12 parts with the mean and variance of 25 mm and 3 mm^2, respectively. What is the lower limit of the 2-sides 95% confidence interval on the mean. Give your answer to 3 decimal places. A sample of 12 parts were randomly selected from a production process. The length was measured on all 12 parts with the mean and variance of 25 mm and 3 mm^2, respectively. What is the upper limit of the 2 sided 95% confidence interval on the mean. Give your answer to 3 decimal places. Given you lower and upper limits on the 85% confidence interval for the mean in Questions 7 and 8, would you agree to reject the Null Hypothesis that the true means is 22 mm? Agree Disagree

Explanation / Answer

as per chegg policies i am answering q1

SE = SD/sqrt(n)

=sqrt(var/n)

=sqrt(3/12)

=0.500

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